A knight from the 12th century, a little girl from WW1, a businessman from the 70’s, and an explorer from the future all get lost in the same forest, where space is unaltered but time is up for grabs.

Hi zelozelos,
Very cool set-up. I am guessing they all want to find their way out of time-limbo and therefore need to figure out what's going on and how to stop it for the bulk part of the movie?

Your general concept is interesting, but ...
Who is the protagonist?
Antagonist?
What is the protagonist's goal?
What is preventing the protagonist from reaching his/her goal?
What weakness does the protagonist need to overcome?
What are the stakes for the protagonist?
As I mentioned, your general concept is very intriguing.